is the code expiration date, when it needs to be applied in account or used by ?

Quote from: Dan on www.dansdeals.com/archives/101829

My 10% off Amazon coupon took an hour to arrive. It states that you must activate the coupon on a single Amazon account by 12/23. Once you activate the offer it will last on your Amazon account for 90 days or until you spend $1,000, whichever comes first.